In React, some of the most common event handlers that are used frequently are:

1. onClick - used for handling click events on elements like buttons, links, etc.

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   <button onClick={handleClick}>Click Me</button>
   

2. onChange - used for handling input changes such as typed text or selected option values.

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   <input type="text" onChange={handleChange} />
   <select onChange={handleSelect}>
   <option value="1">Option 1</option>
   <option value="2">Option 2</option>
   </select>
   

3. onSubmit - used for handling form submissions.

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   <form onSubmit={handleSubmit}>
   <input type="text" />
   <button type="submit">Submit</button>
   </form>
   

These are just a few examples of the many event handlers available in React. You can find more information on React events in the official documentation: https://reactjs.org/docs/events.html

To submit the form data and redirect to another page in React, you'll need to do the following:

1. Wrap your form inside a form tag.
2. Add an onSubmit event handler to your form that prevents the default form submission behavior.
3. Use the useState hook to keep track of the form data.
4. In the onSubmit function, set up your form data object and call any necessary submission methods.
5. Use the history.push() method to redirect to your desired page.

Here's some example code:

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import React, { useState } from 'react';
import { useHistory } from 'react-router-dom';

function MyForm() {
  const [formData, setFormData] = useState({});
  const history = useHistory();

  const handleSubmit = (event) => {
    event.preventDefault(); // Prevents default form submission behavior

    const dataToSubmit = {
      ...formData // Any additional form data object here
    };

    // Call any necessary submission methods here
    // ...

    history.push('/my-new-page'); // Redirect to new page
  }

  const handleInputChange = (event) => {
    const { target } = event;
    const { name, value } = target;

    setFormData({
      ...formData, // Keep existing form data
      [name]: value // Update form data for the input field that changed
    });
  }

  return (
    <form onSubmit={handleSubmit}>
      <label htmlFor="my-input">My Input: </label>
      <input id="my-input" type="text" name="myInput" onChange={handleInputChange} />

      <button type="submit">Submit</button>
    </form>
  );
}

Note: This example uses the useHistory hook from React Router to handle the redirect. If you're not using React Router, you'll need to implement your own redirect method.

To add multiple functions inside a single onSubmit event in React, you can create an arrow function that calls each function you want to run.

Here's an example:

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function Form() {
  const handleSubmit = (e) => {
    e.preventDefault();
    /* Your multiple functions here */
    function1();
    function2();
    function3();
  };

  return (
    <form onSubmit={handleSubmit}>
      {/* Your form fields here */}
    </form>
  );
}

In this example, we've created a function called handleSubmit that is called when the form is submitted. We've added e.preventDefault() to prevent the form from reloading the page.

Then, we've added multiple functions inside the handleSubmit function by calling each function one after another. In this case, we've called function1(), function2(), and function3().

You can easily add any other function inside the handleSubmit function by calling that function in a similar way.

JavaScript events are triggers that initiate the execution of JavaScript code when a certain action occurs. Examples of actions that can trigger events include clicking a button, pressing a key, scrolling the page, hovering over an element, and submitting a form.

For example, when a user clicks a button, a click event is triggered. A keypress event is triggered when a user presses a key. Other events such as scroll, mousemove, focus, and blur, are also triggered when a user interacts with a web page.

In order to use JavaScript events, you must define a function in the code that will be executed when the event action occurs. This is known as an event handler. Some common JavaScript events and their event handlers include onclick, onchange, onkeypress, onmouseover, onsubmit, onfocus, and onblur. For example, to run a function when a user clicks a button, you would use the onclick event handler.

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document.getElementById("myButton").onclick = myFunction;

function myFunction() {
  console.log("The button was clicked!");
}